I got the graves as a birthday present after i had already bought two of the fmf programmers (got an exceptional deal), one for my x and one for my r. If the upside is truly that much better for the PCV i'll be willing to just go with that option instead, however having the fmf programmer already, I figured why not give it a try. Anyone switch over from fmf programmer to power commander for any reason other than it being able use autotune as well to add and subtract fuel instead of just add fuel like the fmf programmer.